Wow, IDK which button to click on! My favorite characters are always the bad guys who try to be good!!!!
Prince Zuko from Avatar: The Last Airbender, Miles Edgeworth from Phoenix Wright, Loreddion from Dragonlance: Elements (the series), James on Team Rocket from PokEmon, Snape from Harry Potter, The Lich King in WoW, Morris from Time Hollow (sort of bad? lol) and MANY MANY MORE!!!! XD

they are more attractive

and also, i don't know why, but the writers or the creators create their identity, inner world and backround more deeply, i think

Villains!!! But not too much wicked ..
my fave---> Ulquiorra Cifer!

I prefer villains. I only like a certain type of them though. Not the empty born-evil-types in some american cartoons. I like when they have depth. My favorite ones are those who start out on the bad side, then has to join the good side even though they really don't want to hang around with the heroes

Magus from Chrono Trigger

Weeell... If they're REALLY good looking and cool I might like them anyway, but that doesn't count since it's only my smaller head talking <.<

Villains...without them, there would be no heroes.
Actually, I like both heroes and villains, if they are well-developed and complex characters-- more of a grey shade than just "white and black".

i like heros....but the villians are the ones who make the story interesting!!!!! i like heros who are funny....

heroes are the best!
i guess i like them so much because they always help those in need
also all the heroes just have great personalities and i guess it's also because they remind me of ppl i know
sure some like to be left alone... did some one said Batman? while others are more friendly *cough* Flash *cough*
and no hero is a hero without a weakness...
my fav hero is Captain America

My favorite villains are Joker from The Dark Night, Harley Quinn, and Sauraun (oh, come on! you can make cararact jokes about his mother -see Lord of the Rings How It Should Have Ended-).